Zookeeper在linux下的装置
去官网下载Zookeeper压缩包，解压到服务器的任意目录下。进入conf文件夹，有一个zoo_sample.cfg的文件，关上编辑进行编辑：
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
#开启四字命令
4lw.commands.whitelist=*其中dataDir能够设置为本人制订的目录，用来寄存快照信息，同时能够增加dataLogDir来配置日志寄存的门路，默认与dataDir同一地位。最初记得开启四字命令配置，不便查看服务器状态。
最初一步，将编辑好的文件改名或复制一份叫zoo.cfg的文件作为配置文件。
（留神这是单机版的配置，非集群）
Zookeeper环境变量配置
关上/etc/profile文件编辑，加上如下语句：
export ZOOKEEPER_HOME=/home/admin/apache-zookeeper-3.6.3-bin
export PATH=$PATH:$ZOOKEEPER_HOME/bin保留退出。
启动Zookeeper
进入bin目录，执行./zkServer.sh start启动服务，同时也有stop、restart等其余命令。
应用自带客户端连贯Zookeeper
进入bin目录，执行./zkCli.sh，即可连贯到服务器，应用help命令能够查看指令，可进行创立节点等操作。
Springboot整合Dubbo
创立一个SpringBoot我的项目作为provider，在pom中退出如下依赖：
<!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.7.8</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-recipes</artifactId>
<version>5.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>5.2.0</version>
</dependency>目前这个版本的Dubbo须要curator的依赖。
在application.properties中配置：
server.port=8080
spring.application.name=dubbo-provider-demo
#蕴含dubbo注解心愿被dubbo扫描的包
dubbo.scan.base-packages=com.guomz.springbootdubbo.dubboService
#用于直连dubbo服务，不通过zookeeper
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880
## 配置zookeeper信息
##如果采纳直连形式不应用zookeeper则须要将address配置为N/A，不配置protocal
#dubbo.registry.address=N/A
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://39.105.145.179:2181之后新创建一个maven工程，并编写服务接口，例如：
public interface MyService {
String sayHello();
Student getStudent();
}之后应用maven install命令将其打入本地maven仓库（也能够是本人的近程仓库），不便后续应用。
接口创立好之后在springboot provider中退出这个依赖，创立服务类实现这个接口并退出Dubbo注解：
import org.apache.dubbo.config.annotation.DubboService;
import org.guomz.entity.Student;
import org.guomz.service.MyService;
@DubboService(version = "1.0.0")
public class MyServiceImpl implements MyService {
@Override
public String sayHello() {
System.out.println("被调用了");
return "hello";
}
@Override
public Student getStudent() {
Student student = new Student();
student.setId(1L);
student.setName("guomz");
System.out.println("被调用了");
return student;
}
}
其中@DubboService注解用于将以后类标识为dubbo服务，能够应用参数version与group来辨别不同的实现类。
再创立一个SpringBoot我的项目作为consumer消费者，依赖与provider统一。
application.properties配置同样与provider雷同，留神区别端口与服务名。
创立controller援用服务：
import org.apache.dubbo.config.annotation.DubboReference;
import org.guomz.entity.Student;
import org.guomz.service.MyService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MyController {
@DubboReference(version = "1.0.0", url = "dubbo://127.0.0.1:20880")
private MyService myService;
@RequestMapping(value = "/hello", method = RequestMethod.GET)
public String hello(){
return "hello";
}
@RequestMapping(value = "/sayhello", method = RequestMethod.GET)
public String callMyServiceHello(){
String result = myService.sayHello();
return result;
}
@RequestMapping(value = "/getstudent", method = RequestMethod.GET)
public Student getStudent(){
return myService.getStudent();
}
}其中@DubboReference用来援用dubbo服务，如果采纳直连provider的形式，须要给url参数赋值，赋值内容为provider配置文件中dubbo.protocal中配置的协定名与端口；如果应用zookeeper，则不须要配置这个参数。version参数须要与provider中配置的统一。
发表回复